TECHNET Archives

May 2002

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
"d. terstegge" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 28 May 2002 12:37:24 +0200
Content-Type:
text/plain
Parts/Attachments:
text/plain (24 lines)
Dear Technetters,

I'm having some problems with really big voids (up to 50% of the diameter) in the solderjoints of BGA's. The problems occur on our only board that has via's in the BGA-pads. The via's are filled and plated, so from the outside you don't see they're there.
I'm quite sure that it's the board that's causing the problems, but the boardvendor does not agree and thinks our solderpaste is causing it.
To prove that I'm right  (or to solve the problem if the boardvendor is right !) I'd like to do some tests with a solderpaste that's known to cause a minimal amount of voiding. From earlier discussions I learned that such solderpastes exist. 
Does anyone have a recommendation for such a solderpaste ?

Daan Terstegge
SMT Centre
Thales Communications
Unclassified mail
Personal Website: http://www.smtinfo.net

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------

ATOM RSS1 RSS2